Children behind the big teeth grow out a piece of meat, physiological is generally not fully grown teeth, there is part of the gingival flap residue caused by the full growth of teeth will be eliminated. Pathological may be due to gingivitis or gingival polyps and other factors. 1. Gingival flap: children in the change of teeth, some children usually have a soft diet, so the teeth are slower to change, there will be residual gingival flap phenomenon when growing, usually after the teeth are completely grown will subside on its own. But be careful not to accumulate food debris in the gingival flap, so as not to cause inflammation and swelling of the gingival flap, bleeding and pain phenomenon. 2. Gingivitis: generally due to food blockage, tooth misalignment and crowding, etc., can lead to gingivitis in children, resulting in bleeding gums, swelling, and in severe cases, granulation hyperplasia, pimples, so it looks like a piece of meat around the big teeth, in addition to accompanying tooth loosening, localized pain in the gums and other symptoms. 3. Gingival polyps: mostly occur after dental caries, early generally asymptomatic, with the polyps continue to grow, protruding from the surface of the caries cavity, can appear behind the child’s big teeth out of a piece of meat, accompanied by pain, bleeding, ulcers and other symptoms. If the child grows a piece of meat behind the big teeth does not get better, you should go to the hospital as soon as possible to the stomatology department, after the cause of the disease is clear and symptomatic treatment.